Abstract
The asymmetric unit of the title compound, [Co(C(8)Br(4)O(4))(C(3)H(4)N(2))(2)(H(2)O)(2)] (n) or [Co(Br(4)bdc)(im)(2)(H(2)O)(2)] (n) , comprises half of Co(II) ion, tetra-bromo-benzene-dicarboxylate (Br(4)bdc(2-)), imidazole (im) and a water mol-ecule. The Co(II) ion exhibits a six-coordinated octa-hedral geometry with two oxygen atoms of the Br(4)bdc(2-) ligand, two oxygen atoms of the water mol-ecules, and two nitro-gen atoms of the im ligands. The carboxyl-ate group is nearly perpendicular to the benzene ring and shows monodentate coordination to the Co(II) ion. The Co(II) ions are bridged by the Br(4)bdc(2-) ligand, forming a one-dimensional chain. The carboxyl-ate group acts as an inter-molecular hydrogen-bond acceptor toward the im ligand and a coordinated water mol-ecule. The chains are connected by inter-chain N-H⋯O(carboxyl-ate) and O-H(water)⋯O(carboxyl-ate) hydrogen-bonding inter-actions and are not arranged in parallel but cross each other via inter-chain hydrogen bonding and π-π inter-actions, yielding a three-dimensional network.